vrs51c1100 ETC-unknow, vrs51c1100 Datasheet - Page 26

• Manufacturer Part Number: vrs51c1100
• Description: Versa 8051 Mcu With 128kb Of Iap/isp Flash
• Manufacturer: ETC-unknow

In Mode 2, the baud rate is programmable to either
1/32 or 1/64 the oscillator frequency.
F
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SMOD
Fosc/2
IGURE
Write to
VRS51C1100
SBUF
÷2
0 1
19: S
RXD
1-0 Transition
Sample
Detector
ERIAL
÷16
1
P
ORT
S
D
CLK
Start
Detector
LOAD SBUF
Stop
Start
TX Clock
÷16
M
Bit
Q
ODE
RX Clock
Control
2 B
ZERO DETECTOR
LOCK
TX Control Unit
RX Control Unit
Internal Bus
D
TI
RI
Internal Bus
IAGRAM
SBUF
SBUF
9-Bit Shift Register
Shift
Serial Port
Interrupt
Shift
Send
Data
SBUF
SHIFT
READ SBUF
Load
TXD
UART Operation in Mode 3
In Mode 3, 11 bits are transmitted (through TXD) or
received
composed of: a Start bit (low), 8 data bits (LSB first), a
programmable 9
Mode 3 is identical to Mode 2 in all respects but one,
the baud rate. Either Timer 1 or Timer 2 generates the
baud rate in Mode 3.
F
SMOD
RCLK
IGURE
Timer 1
Overflow
÷2
0 1
Write to
0
0
20: S
SBUF
Timer 2
Overflow
1
1
RXD
TCLK
1-0 Transition
ERIAL
SAMPLE
Detector
(through
÷16
P
1
ORT
S
D
M
CLK
RX Clock
Start
Detector
th
LOAD SBUF
÷16
ODE
Start
TX Clock
Bit
Q
data bit and a Stop bit (high).
3 B
Shift
ZERO DETECTOR
RXD).
LOCK
TX Control Unit
RX Control Unit
Internal Bus
D
TI
RI
Internal Bus
IAGRAM
SBUF
SBUF
9-Bit Shift Register
The
Serial Port
Interrupt
Shift
Send
Data
SBUF
SHIFT
READ SBUF
Load
transactions
page 26 of 50
are
TXD